I don't think this is bad algae. Just green water. I've got a few algae eaters in the tank. It might be because i have to plants in the gbs right now. Don't know much of a crop to plant in the fall/winter here. I tried some collards, mustards, greens but they don't seem to like that much water. They grow a few inches then die.
I have not had a fish die in months. I started AP back in april. Only had a few fish die since then. Thinking of putting the fish (catfish and bream) into my pond and starting all over in the spring.